#include <stdio.h>
#include<math.h>
int main()
{
    int a, b, c;
    scanf("%d %d %d", &a, &b, &c);
    float circumference = a + b + c;
    float p = circumference / 2;
    float area = sqrt(p * (p - a) * (p - b) * (p - c));
    printf("circumference=%.2f area=%.2f", circumference, area);
    return 0;
}